| Remove All Adjacent Duplicates In String | Easy | 72.8% | 91.1% |
| Vowel Spellchecker | Medium | 61.4% | 88.5% |
| Remove All Adjacent Duplicates in String II | Medium | 60.9% | 87.0% |
| Repeated DNA Sequences | Medium | 52.9% | 80.0% |
| Generate Parentheses | Medium | 78.3% | 75.3% |
| Minimum Substring Partition of Equal Character Frequency | Medium | 40.0% | 54.8% |
| Word Search | Medium | 46.9% | 54.8% |
| Implement Trie (Prefix Tree) | Medium | 69.2% | 54.8% |
| Check If a String Contains All Binary Codes of Size K | Medium | 61.5% | 54.8% |
| Word Break II | Hard | 55.1% | 54.8% |
| Recover a Tree From Preorder Traversal | Hard | 83.2% | 46.4% |
| Special Binary String | Hard | 79.3% | 46.4% |
| Decode the Slanted Ciphertext | Medium | 50.3% | 46.4% |
| Maximum Palindromes After Operations | Medium | 45.6% | 46.4% |
| Word Break | Medium | 49.1% | 46.4% |
